A water tower stands on a hill 100m high. A person in the distance views the top of the hill at a 30 degree angle of elevation. The same person views the top of the water tower at a 60 degree angle of elevation. What is the height of the water tower? Round to the nearest meter.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.